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Exped Ultra 6.5R Sleeping Pad vs Sea to Summit Spark SP III

Weight and specs compared for 2026 — and which one to choose.

Exped Ultra 6.5R Sleeping Pad is the lighter option — 339 g lighter than the Sea to Summit Spark SP III (48% less weight). If grams matter to you, that is the one to beat.
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Spec Exped Ultra 6.5R Sleeping Pad Sea to Summit Spark SP III
Weight 370 g · 0.370 kg · 0.82 lb 709 g · 0.709 kg · 1.56 lb
Brand Exped Sea to Summit
Category Sleep System Sleep System
Exped Ultra 6.5R Sleeping Pad
370 g

Inflatable pad, 13oz, R-value 6.5, excellent insulation for all seasons

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Sea to Summit Spark SP III
709 g

850-fill down sleeping bag rated to 0°C / 32°F.

Full details →

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Exped Ultra 6.5R Sleeping Pad vs Sea to Summit Spark SP III: which should you buy?

If saving weight is your priority, the Exped Ultra 6.5R Sleeping Pad wins — at 370 g it is 339 g (48%) lighter than the Sea to Summit Spark SP III (709 g). That said, the heavier option may justify the extra grams with more capacity, durability or comfort, so weigh the trade-off against how you'll use it.

See where both rank against everything else in this category on the lightest sleep system page, or browse the full gear weight database.

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